C++ Program to reverse array number

#include <bits/stdc++.h>
using namespace std;
void printarray(int arr[],int n)
{
    cout<<"print array\n";
    for(int i=0;i<n;i++)
    {
        cout<<arr[i]<<" ";
    }
}
void revarray(int arr[],int n)
{
    cout<<"\nreverse array\n";
    for(int i=n;i>=0;i--)
    {
        cout<<arr[i]<<" ";
    }
}
int main()
{
    int n;
    int array[]={1,6,87,9,5,7};
    n=sizeof(array)/sizeof(array[0]);
    printarray(array,n);
    revarray(array,n-1);
    return 0;
}